PotM GrandMarq.NET - Panther Headquarters Forum Index PotM
GMN Chat Room GMN's STORE!! GMN's Gallery Please!!
Results 1 to 5 of 5

Thread: 2.73 to 3.55 on 2011 GMQ

  1. #1
    I shall not pass this way again. Smokestacklightnin's Avatar
    Join Date
    Feb 2009
    Location
    Riverbottom, TX
    Posts
    723

    Default 2.73 to 3.55 on 2011 GMQ

    Eventually would like to change the stock 2.73 to a 3.55 on my 2011 GMQ. What else would I have to do to keep the rest of the drive train happy. Would I need to buy a tuner to compensate for the gear change or is there something else that could be done to correct or prevent drivability issues.

    2011 Grand Marquis LS Ultimate Edition
    1984 2Dr Crown Vic "The Millennium Falcon" RIP
    Carbed 5.0 HO w/nitrous , Performer RPM intake, GT40P heads, E303 cam, FRP Shorties, FRP 9mm plug wires, Off-Road H-pipe, Magnaflow round mufflers, 2000 rpm stall
    NA-15.78@91.21, 80hp shot-14.48@96.21

  2. #2
    Doctorate in Redneck Engineering
    Join Date
    Jul 2018
    Location
    Leon County
    Posts
    175

    Default

    A Mo’s Speed Shop tune is the easiest way to compensate for it. If you plan to go that route though, I’d do all your tune requiring modifications at once/before you get the tune. Do a dual exhaust, MZT and maybe a throttle body if you’re planning on doing any of them, then do the gears and get the tune.
    2010 Mercury Grand Marquis LS “The Douche” - 70mm throttle body, P71 airbox, 21mm rear sway bay, dual exhaust, Dodge rims, 89K and counting. 4/2018-
    1966 Ford Thunderbird (390FE) “Fordy McFordface” - engine rebuild No. 3. 11/2016-
    RIP 2005 Buick LaCrosse CXS “Jumba” - gone too soon, 229K. 6/2017-2/2018
    RIP 2001 Chevrolet Tracker LT “Featherbrick” - gone too late, 156K POS. 6/2016-9/2016.
    Sold 2005 Toyota 4Runner SR5 - 198K. 6/2016-4/2018

  3. #3
    Beater gonna beat sly's Avatar
    Join Date
    Mar 2010
    Location
    Lewisville, TX
    Posts
    21,093

    Default

    Yeah, you'll want to get the PCM tuned for the gears. I'll be getting a tuning kit myself to do exactly that to the 99 PCM I have to swap into my PI swapped 93 that currently has a 01 PCM in it. I'm also using the kit to try to eliminate some CEL issues with stuff that my car is not even equipped with. I won't be able to help you since it doesn't support past 06 though.

    Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
    rides: 88 MGM (SOLD), 93 Vic, 2000 Crown Vic, 2003 Expedition
    Quote Originally Posted by gadget73
    ... and it should all work like magic and unicorns and stuff.
    Quote Originally Posted by dmccaig
    Overhead, some poor bastards are flying in airplanes.

  4. #4
    I shall not pass this way again. Smokestacklightnin's Avatar
    Join Date
    Feb 2009
    Location
    Riverbottom, TX
    Posts
    723

    Default

    Thanks for the input everyone. I already have the dual exhaust done. The gears will come later. I'm considering a tuner from SCT after the swap, I also want to use it to make the transmission shift snappier and raise the speed governor. As far as mods to the engine I probably will leave it stock for a while. Want to keep this car more of a fun cruiser and not a hotrod (been there done that)

    2011 Grand Marquis LS Ultimate Edition
    1984 2Dr Crown Vic "The Millennium Falcon" RIP
    Carbed 5.0 HO w/nitrous , Performer RPM intake, GT40P heads, E303 cam, FRP Shorties, FRP 9mm plug wires, Off-Road H-pipe, Magnaflow round mufflers, 2000 rpm stall
    NA-15.78@91.21, 80hp shot-14.48@96.21

  5. #5
    Beater gonna beat sly's Avatar
    Join Date
    Mar 2010
    Location
    Lewisville, TX
    Posts
    21,093

    Default

    Just note that SCT (because of legal fiascoes with the gov) can no longer eliminate emission items. If you want to do that, it may be better to try HP tuners. Found this out when I got the tune done on the 99 PCM. I have an SCT that's interfaced with that thing.

    Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
    rides: 88 MGM (SOLD), 93 Vic, 2000 Crown Vic, 2003 Expedition
    Quote Originally Posted by gadget73
    ... and it should all work like magic and unicorns and stuff.
    Quote Originally Posted by dmccaig
    Overhead, some poor bastards are flying in airplanes.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
GMN Approved Links!


www.rockauto.com www.adtr.net